package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 新增套餐
     * @param setmealDTO
     */
    public void save(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();

        BeanUtils.copyProperties(setmealDTO, setmeal);

        setmealMapper.insert(setmeal);

        List<SetmealDish> setmealDishList = setmealDTO.getSetmealDishes();
        if(setmealDishList != null && !setmealDishList.isEmpty()) {
            Long setmealId = setmeal.getId();
            setmealDishList.forEach(setmealDish -> setmealDish.setSetmealId(setmealId));
            setmealDishMapper.insertBatch(setmealDishList);
        }
    }

    /**
     * 套餐分页查询
     * @return
     */
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());

        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);

        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 根据id查询套餐
     * @param id
     * @return
     */
    public SetmealVO getById(Long id) {
        SetmealVO setmealVO = new SetmealVO();

        Setmeal setmeal = setmealMapper.getById(id);

        BeanUtils.copyProperties(setmeal, setmealVO);

        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(setmeal.getId());

        setmealVO.setSetmealDishes(setmealDishes);

        return setmealVO;
    }

    /**
     * 修改套餐
     * @param setmealDTO
     */
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();

        BeanUtils.copyProperties(setmealDTO, setmeal);

        setmealMapper.update(setmeal);

        setmealDishMapper.deleteById(setmealDTO.getId());

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        if(setmealDishes != null && !setmealDishes.isEmpty()) {
            setmealDishes.forEach(setmealDish -> setmealDish.setSetmealId(setmealDTO.getId()));
            setmealDishMapper.insertBatch(setmealDishes);
        }
    }

    /**
     * 启用禁用套餐
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        // 判断套餐关联的菜品是否启用
        if(status.equals(StatusConstant.ENABLE)) {
            List<Long> dishList = setmealDishMapper.getDishesBySetmealId(id);
            for(Long dishId : dishList) {
                Dish dish = dishMapper.getById(dishId);
                if(dish.getStatus().equals(StatusConstant.DISABLE)) {
                    //关联的菜品是禁用就抛异常
                    throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                }
            }
        }
        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }

    /**
     * 批量删除套餐
     * @param ids
     */
    @Transactional
    public void deleteBatch(List<Long> ids) {
        for(Long id : ids) {
            Setmeal setmeal = setmealMapper.getById(id);
            if(setmeal.getStatus().equals(StatusConstant.ENABLE)) {
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }

        setmealDishMapper.deleteBatch(ids);

        setmealMapper.deleteBatch(ids);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
